Sodium hydroxide dissolves in water
Hydrochloric acid reacts with potassium hydroxide to produce a salt, water, and heat
A pellet of sodium is sliced in two
Water is heated and changed to steam
Potassium chlorate decomposes to potassium chloride and oxygen gas
When placed in H2O, a sodium pellet catches on fire as hydrogen gas is liberated and sodium hydroxide forms
Sugar dissolves in water
Pancakes cooking on a griddle
Grass growing in a lawn
A tire is inflated with air
Food is digested in the stomach
Water is absorbed by a paper towel
Lighting a match
Breath fogging a mirror
Bleaching a stain
Physical Changes are
changes in which the identity of a substance doesn't change but the arrangement, location, and speed that make up the substance may change)
Chemical Changes are
changes in which the identities of substances change and new substances form
Evidences of Chemical Changes are
the evolution of gas, the formation of precipitate, the release or absorption of energy, or color change in the reaction system
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